Answer:
Mass = 16.7 g
Step-by-step explanation:
Given data:
Volume = 125 mL (125/1000 =0.125 L)
Molarity = 2.50 M
Mass in grams of solute = ?
Solution:
First of all we will calculate the number of moles:
Molarity = number of moles solute / volume in litter
2.50 M = Number of moles of solute/ 0.125 L
Number of moles of solute = 2.50 M × 0.125 L
Number of moles of solute = 0.313 mol
Grams of solute:
Number of moles = mass / molar mass
Mass = number of moles × molar mass
Mass = 0.313 mol × 53.5 g/mol
Mass = 16.7 g